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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Luteolysis happens because of the ____________ hormone






2. Produce testosterone. located between the seminiferous tubules






3. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days






4. 283 days






5. Small tubes located at the upper ends of the uterine horns. connects uterine horn to infundibulum. passageway of the egg.






6. The more stressed out the male is - the less sperm he is going to produce






7. Way to know everything is alright with the breeding male






8. FEED






9. When are steers and heifers weaned from bottle feeding?






10. Pulls sperm and egg together - gets body ready for pregnany - stimulates growth cells - develops mammary glands - starts to deposit fat.






11. Pulls sperm and egg together - gets body ready for pregnany - stimulates growth cells - develops mammary glands - starts to deposit fat.






12. Hold the penis in the bulls body when not in use. releases penis before ejaculation or urination.






13. (male) pushes the testes outward toward the legs for a cool-down off of the body






14. Milk made by mother which includes antibodies for the calf. MUST be given to the calf within the first 24 hrs of life. also provides calf with energy stores. effectiveness lasts from 4-8 months of age.






15. Microscopic - make sure not sterile - very few bulls are actually tested






16. BST given to dairy cattle makes the mammary gland more persistent - helps produce more milk. good as Long-term because it does not cause cow to bulk up - provides more milk/cow Which means less cows needed - less cows need to be given feed - lower co






17. Animal which has been castrated after puberty






18. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)






19. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.






20. Animal which has been castrated after puberty






21. Serves as a bone cradle for the reproductive system. used greatly in palpation as a 'landmark'.






22. 1-2 days






23. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)






24. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers






25. 114 days






26. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat






27. 19-23 (21) days






28. (LH) stimulates the Leydig cells to produce testosterone






29. 16-20 hours






30. Implies the amount of estrogen production






31. (FSH) causes egg to mature in females






32. Animals which have many estrous periods during certain periods per year (ex: mare - ewe)






33. 1. need to be restricted in amt of grain - 2. no more than 70% of ration can be concentrates. 3. *Acidic acid has to be produced in order for milk synthesis to occur (30% forages)






34. Can survive ~7 days in cow. vast majority <48 hours






35. Superior genes are _______ to multiply






36. 4-6 days






37. 24 hours before end of estrus cycle






38. 1. visual evaluation - 2. scrotal circumference - 3. penis and prepuce observation - 4. rectal palpation - 5. libido test - 6. semen evaluation






39. Help to signal hormone levels which we need both in the brain right next to each other.






40. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders






41. 26 hours after estrus begins






42. 19-23 (21) days






43. So when offspring are born - there is more food to be found for energy stores and fat deposits IN THE SPRING






44. Knife-loose ~1wk of growth. band-loose ~2wks of growth.






45. Hold the penis in the bulls body when not in use. releases penis before ejaculation or urination.






46. 2 month growth cycle. stored in the epididymis of the bull






47. So when offspring are born - there is more food to be found for energy stores and fat deposits IN THE SPRING






48. ~305 days (altough often longer due to breeding difficulties)






49. Castration tool which clamps down on the vans deferens. causes the sperm to not reach the penis to be ejaculated






50. Check feet and legs - look for masculine traits in build such as crest and muscling